MC9S08SH8CWJ - 8-bit 40MHz 8KB Flash MCU | NXP
Teilenummer: MC9S08SH8CWJ ✗ AbgekündigtMC9S08SH8CWJ Übersicht
An 8-bit microcontroller is a compact embedded processor intended for controlling sensors, actuators, communication interfaces, and simple logic. The MC9S08SH8CWJ belongs to the S08SH family within the broader HCS08 low-cost 8-bit MCU portfolio. Its 5V operating focus makes it relevant to industrial controls, appliance interfaces, embedded measurement systems, and legacy equipment that benefits from an economical controller with multiple on-chip peripherals.
The principal device characteristics are a 40MHz maximum clock, 8KB of embedded flash program memory, an 8-bit architecture, and a 20-pin SOIC package. The NXP product page identifies SCI, SPI, I2C, ADC, and analog comparator resources in the S08SH family. This integration can reduce external component count by placing communication, sensing, and basic comparison functions directly beside the processor core.
The S08 family emphasizes code density and a compact instruction set for cost-sensitive embedded products. NXP states that the S08SH family is pin, tool, and software compatible with S08SG, giving designers access to a broader software and tooling environment. That compatibility supports firmware portability and simplifies transitions within the S08 ecosystem, although every migration still requires verification of peripheral availability, memory limits, timing, and board-level constraints.
Typical MC9S08SH8CWJ applications include small industrial control panels, motor or relay supervisory circuits, temperature-measurement modules, serial-interface adapters, and compact 5V consumer appliances. The on-chip serial interfaces support sensors and peripheral ICs, while the ADC and comparator are useful when a design requires simple analog sensing rather than a high-resolution external converter.
PCB design should preserve the package pin assignments, provide proper 5V supply decoupling, and route sensitive analog inputs away from fast switching nodes. Firmware should be tested for interrupt timing, ADC sampling behavior, and communication timing because the 40MHz CPU clock does not guarantee that every peripheral can operate at that rate. For obsolete-product risk reduction, request lifecycle and sourcing options through the Request a Quote form.
This product page combines the confirmed S08SH electrical and packaging details with practical placement, firmware, and sourcing guidance. It also distinguishes verified drop-in replacements from generic cross-reference candidates, helping engineers evaluate board reuse without confusing merely similar microcontrollers with true pin-compatible alternatives.
Drop-in-Alternativen für MC9S08SH8CWJ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernMC9S08SH8CWJ Grenzwerte & elektrische Eigenschaften
| Microcontroller Type | 8-bit S08SH microcontroller |
| Processor Core | Enhanced HCS08 core |
| Maximum CPU Frequency | 40 MHz |
| Flash Memory | 8 KB |
| Program Memory Organization | 8K x 8 bits |
| Architecture | 8-bit |
| Nominal Supply Voltage | 5 V |
| Gehäuse | 20-pin SOIC |
| Montageart | Surface mount |
| Integrated Comparator | Yes |
| Serial Communications Interface | SCI |
| Serial Peripheral Interface | SPI |
| Inter-Integrated Circuit Interface | I2C |
| Analog-to-Digital Converter | ADC |
MC9S08SH8CWJ 20-pin soic Pinbelegungsleitfaden
Pinbelegung für MC9S08SH8CWJ (20-pin soic-Gehäuse). Dieser digitale IC umfasst GPIO, Kommunikationsschnittstellen (UART, SPI, I2C) und Versorgungspins. Alternative Pin-Funktionen und Konfigurationsoptionen entnehmen Sie dem Herstellerdatenblatt. Unverzichtbar für Embedded-System-Design und PCB-Layout.
Keine detaillierten Pinbelegungsdaten verfügbar für MC9S08SH8CWJ.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
MC9S08SH8CWJ ist geeignet für 6 Anwendungs: Compact Industrial Control Module, Temperature and Analog Sensing Node, Serial Interface Adapter, Appliance User Interface Controller, Motor and Relay Supervisory Control, 5V Embedded Communications Hub.
Compact Industrial Control Module
The MC9S08SH8CWJ fits compact industrial control modules that supervise relays, indicators, pushbuttons, and discrete sensors from a 5V rail. Its 40MHz 8-bit core provides useful timing headroom, while SCI and SPI can connect local interface ICs or a higher-level controller. The confirmed ADC and comparator support basic analog supervision without requiring separate converter chips. Designers should partition memory carefully because the device has 8KB of flash, and should validate logic levels, isolation boundaries, and industrial temperature requirements before production release.
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Temperature and Analog Sensing Node
The MC9S08SH8CWJ is suitable for a 5V temperature or analog sensing node that combines local measurement with a serial uplink. Its ADC provides a direct path for compatible analog inputs, while the comparator can support threshold detection and simple protection functions. SCI, SPI, or I2C can connect a sensor, display, or communications peripheral. A production design should confirm the ADC resolution and sampling characteristics in the manufacturer documentation, calibrate offsets and gain, and isolate analog traces from switching and high-current paths.
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Serial Interface Adapter
The MC9S08SH8CWJ can serve as a compact protocol-conversion or serial-interface adapter in legacy 5V equipment. Its SCI and SPI interfaces allow the controller to bridge a host-facing serial link to a peripheral bus, while the 40MHz core supports protocol state machines and service commands. The 8KB flash budget requires efficient fixed-point formatting and a careful bootloader strategy for field updates. Firmware should include timeout recovery, checksum validation, and bus-direction controls to prevent unintended conflicts when either connected peripheral resets.
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Appliance User Interface Controller
The MC9S08SH8CWJ is appropriate for appliance user-interface boards operating from 5V. It can scan buttons, drive indicators, monitor a keypad, and communicate with a main controller through SCI or SPI. Its integrated comparator can assist with simple level detection, while the ADC supports additional analog controls. Because the 8KB flash is limited, the interface firmware should minimize dynamic memory use and avoid heavyweight graphics or logging. Hardware validation should cover switch bounce, indicator loading, brownout behavior, and startup states across the complete appliance power cycle.
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Motor and Relay Supervisory Control
The MC9S08SH8CWJ can supervise low-power motor, relay, or solenoid control boards when the MCU handles sequencing rather than directly carrying the load current. Its 40MHz execution rate supports deterministic task scheduling, while SCI and SPI permit connection to driver or monitoring electronics. The ADC and comparator can monitor feedback signals if their electrical limits match the application. Keep the MCU supply and control signals separated from inductive and high-current paths, include appropriate protection, and account for transient events during relay release or motor startup.
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5V Embedded Communications Hub
The MC9S08SH8CWJ can coordinate a small 5V communications hub containing one or more serial devices. SCI provides a straightforward host interface, while SPI or I2C can connect sensors, memory, or a wireless module. The 40MHz core is suitable for protocol framing and buffer management, although the 8KB flash and unlisted RAM size require disciplined firmware sizing. Use interrupt-driven transfers where practical, define timeouts for every peripheral, and test bus contention after reset. The final design must also verify operating-temperature and supply-range requirements for the intended deployment.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC9S08SH8CWJ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Brand | NXP Semiconductors |
| Package | 20-pin SOIC |
| CPU Architecture | 8-bit enhanced HCS08 core |
| Maximum CPU Frequency | 40 MHz |
| Flash Memory | 8 KB |
| Program Memory Organization | 8K x 8 bits |
| Nominal Supply Voltage | 5 V |
| Integrated Comparator | Yes |
| Serial Interfaces | SCI, SPI, and I2C |
| Analog-to-Digital Converter | Yes |
| Lifecycle Status | End of Life |
Wichtigste Unterscheidungsmerkmale
- Confirmed integration of communications and analog functions (vs. Generic cross-reference candidates)
- Specific 20-pin SOIC integration (vs. MC9S08SE8CTG)
- S08 tool and software compatibility (vs. Non-S08 8-bit microcontrollers)
Designhinweise
Place the required supply-decoupling capacitor close to the device power pins and provide a low-impedance ground return. Route oscillator, programming, reset, and communication signals away from inductive loads and switching nodes. Because the package is a 20-pin SOIC, inspect the manufacturer land pattern carefully rather than substituting a generic SOIC footprint with different pad dimensions.
Assign SPI, I2C, and SCI pins only after reviewing the datasheet pin multiplexing and alternate-function requirements. Keep I2C traces short, provide the appropriate pull-up arrangement, and confirm signal levels against every connected peripheral. For ADC and comparator inputs, use a quiet return path, avoid routing adjacent to digital clock signals, and validate the analog operating range before relying on a threshold measurement.
Do not treat every S08-family MCU as a drop-in replacement for this device. The S08SH family is described as pin, tool, and software compatible with S08SG, but an alternative must also have the same 20-pin SOIC footprint, acceptable voltage range, sufficient memory, required peripherals, and a suitable lifecycle status. Prototype and validate any replacement before committing it to a new PCB.
The nominal 5V application target does not replace verification of the exact operating supply limits. Check brownout, startup, and load-transient behavior across the complete board rather than only at the nominal point. Include the microcontroller and any communications module in the overall power budget, and use the manufacturer guidance for decoupling and external load-switch sequencing.
Compliance-Informationen
The NXP product page identifies the device as End of Life. Specific environmental and material-compliance declarations were not established for this exact orderable part.